BEWARE: this will target the nearest enemy with that name. So if you macro it with multi-shot to attack the detonating lashers while soloing Freya, and there are 9 adds on your pet and 1 on you, you will cast multi-shot on the on attacking you (and see a great "target too close").

Step 1: Dismiss pet. Run.
Step 2: summon other/same pet. Send him to attack. Cast misdirection, score a hit or two, Mend pet. Once he has healed to full, Feign death. Re-misdirect, and you should be good.

The /focus part is necessary if you use the pet focus to check his health/buffs/debuffs in fights.

Snake trap: if used for the pet switch, use before dismissing, FD as soon as possible, and do not attract aggro to the pet before he heals to full.
It can also be used for trap/FD/raise pet.
No point of using it if the boss has an AoE

To be familiar with these switches, check Patchwerk/Iron council videos.

Concussive shot: can be useful for kiting, some adds can be dazed.
Scatter shot: gives you the time needed to use freezing trap.
Freezing trap: can be useful
Frost trap: can be useful for kiting
Explosive trap: can be useful for low-health fast-moving adds (maexxna's spiderlings).

Tranquilizing shot: dispels not only enrage effects, but also magic ones. Remember.
Distracting shot: works on some bosses, allowing you to kite them between you and your pet.

Master's Call: Besides the de-root effect, it an be useful to:
-get the pet out of the bad stuff
-get the pet where you want him to be
-get the pet out of melee range of bosses: put yourself at maximum range, master's call, disengage, run, and your pet will get a few precious seconds without taking damage.